I'd like to suggest that you folks get and implament the vbSEO module. I use it on my forums, and it's worth every penny. Google doesn't index every 'dynamicly generated' page in a site with lots of ?'s and &'s in the URL. vbSEO will make all the threads in the forum more google-friendly, by adding the topic keywords into the URL string, instead of numbers. It will also help ensure ALL your forum threads get indexed. I'm not a vbSEO salesman, but it's an awesome product. For the price of a vBulletin license, they should include something like this, imho. But they currently do not.